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Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof

A technology of multi-wall carbon nanotubes and bimetallic nanometers, applied in the field of electromagnetic composite materials, to achieve the effects of wide frequency band, enhanced absorption capacity, and easy operation

Active Publication Date: 2018-11-16
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of porous carbon / multi-walled carbon nanotube nanocomposite absorbing materials by combining bimetallic organic framework materials with multi-walled carbon nanotubes.

Method used

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  • Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof
  • Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof
  • Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Weigh 50mg MWCNTs, 1.74g Co(NO 3 ) 2 ·6H 2 O and 1.78g Zn(NO 3 ) 2 ·6H 2 O was sequentially added to methanol / absolute ethanol mixture. Stir vigorously for 30 minutes and then ultrasonically disperse for 30 minutes, alternately for 5 times, and control the stirring and ultrasonic time for 2.5 hours. The resulting mixture was labeled solution A.

[0029] 2. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Then 3.94 g of 2-methylimidazole was added and stirred vigorously for 20 min. The resulting mixture was labeled solution B.

[0030] 3. Quickly add solution B into solution A under the condition of vigorous stirring, stir vigorously for 20 minutes, and leave the mixed dispersion to age for 24 hours.

[0031] 4. After aging, wash repeatedly with absolute ethanol by centrifugation for several times, collect the precipitate, put it into a vacuum drying oven, ...

Embodiment 2

[0035] 1. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Weigh 25mg MWCNTs, 1.74g Co(NO 3 ) 2 ·6H 2 O and 1.78g Zn(NO 3 ) 2 ·6H 2 O was sequentially added to methanol / absolute ethanol mixture. Stir vigorously for 30 minutes and then ultrasonically disperse for 30 minutes, alternately for 5 times, and control the stirring and ultrasonic time for 2.5 hours. The resulting mixture was labeled solution A.

[0036] 2. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Then 3.94 g of 2-methylimidazole was added and stirred vigorously for 20 min. The resulting mixture was labeled solution B.

[0037] 3. Quickly add solution B into solution A under the condition of vigorous stirring, stir vigorously for 20 minutes, and leave the mixed dispersion to age for 24 hours.

[0038] 4. After aging, wash repeatedly with absolute ethanol by centrifugation for several times, collect the precipitate, put it into a vacuum drying oven, ...

Embodiment 3

[0042] 1. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Weigh 0mg MWCNTs, 1.74g Co(NO 3 ) 2 ·6H 2 O and 1.78g Zn(NO 3 ) 2 ·6H 2 O was sequentially added to methanol / absolute ethanol mixture. Stir vigorously for 30 minutes and then ultrasonically disperse for 30 minutes, alternately for 5 times, and control the stirring and ultrasonic time for 2.5 hours. The resulting mixture was labeled solution A.

[0043] 2. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Then 3.94 g of 2-methylimidazole was added and stirred vigorously for 20 min. The resulting mixture was labeled solution B.

[0044] 3. Quickly add solution B into solution A under the condition of vigorous stirring, stir vigorously for 20 minutes, and leave the mixed dispersion to age for 24 hours.

[0045] 4. After aging, wash repeatedly with absolute ethanol by centrifugation for several times, collect the precipitate, put it into a vacuum drying oven, a...

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Abstract

The invention discloses a bimetallic-organic-framework-based derived porous carbon / multi-wall carbon nanotube nano composite absorbing material and a preparation method thereof. On the basis of a hightemperature pyrolysis method, the porous carbon / multi-wall carbon nanotube nano composite material is prepared by using a multi-wall carbon nano tube as a carrier, cobaltous nitrate hexahydrate and zinc nitrate hexahydrate as metal salt precursors, 2-methylimidazole as an organic ligand, and methanol and ethanol as mixed solvents. The preparation method has good green and environment-friendly effects; no hazardous by products are generated; and the preparation process is simple. The prepared nano composite material has advantages of high electromagnetic wave absorption capacity, large absorption frequency bandwidth and low density. Electromagnetic wave with different wavebands can be absorbed effectively by adjusting the additive amount of the multi-wall carbon nano tube and the coating thickness. The bimetallic-organic-framework-based derived porous carbon / multi-wall carbon nanotube nano composite absorbing material and the preparation method thereof have the great application valuein the electromagnetic absorption and electromagnetic shielding fields.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic composite materials, and in particular relates to a method for preparing a bimetallic organic framework derived porous carbon / multi-wall carbon nanotube nanocomposite wave-absorbing material. Background technique [0002] With the development of electromagnetic stealth technology in the military field and the increasingly serious problems of electromagnetic interference and electromagnetic pollution, electromagnetic wave absorbing materials have gradually become a research hotspot in the field of functional materials. Electromagnetic wave absorbing material refers to a class of materials that can absorb and attenuate incident electromagnetic waves, convert electromagnetic energy into heat or other forms of energy and dissipate it, or make electromagnetic waves disappear due to interference. Traditional electromagnetic wave absorbing materials, such as ferrite, metal micropowder and silicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C01B32/168C01B32/05B82Y30/00C08G83/00
CPCB82Y30/00C01B32/05C01B32/168C08G83/008H05K9/0081
Inventor 疏瑞文李为杰张佳宾吴越孙瑞瑞陈雅南谢艳
Owner ANHUI UNIV OF SCI & TECH
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